10... f8g7  11. e1g1  11... e8g8  12. d4d3 [%c_highlight c4;keyPressed;none;opacity;0.8;square;c4;persistent;false,e4;keyPressed;none;opacity;0.8;square;e4;persistent;false][%c_arrow d6d5;keyPressed;none;from;d6;opacity;0.8;to;d5;persistent;false,b7b5;keyPressed;none;from;b7;opacity;0.8;to;b5;persistent;false] The queen has to be removed from the x-ray of the g7-bishop. We have a strategically interesting position on the board. White has the space advantage typical of the \"c4 and e4\" pawn formation, but the exchanges of minor pieces greatly alleviated Black's position. The most important element in positional play is the pawn structure, and this involves considering pawn breaks. The question here is whether Black will have time to prepare the rupture on d5 or b5, which guarantees him equality, or whether he will need to wait passively, which will give White a small advantage. 12... d7c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] A good move that frees up the d7-square for the knight and puts pressure on both e4 and c4.